3 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB)
24 #if defined(CONFIG_S3C2400) || defined(CONFIG_TRAB)
26 #elif defined(CONFIG_S3C2410)
30 DECLARE_GLOBAL_DATA_PTR;
33 #define UART_NR S3C24X0_UART0
35 #elif defined(CONFIG_SERIAL2)
36 # if defined(CONFIG_TRAB)
37 # error "TRAB supports only CONFIG_SERIAL1"
39 #define UART_NR S3C24X0_UART1
41 #elif defined(CONFIG_SERIAL3)
42 # if defined(CONFIG_TRAB)
43 # #error "TRAB supports only CONFIG_SERIAL1"
45 #define UART_NR S3C24X0_UART2
48 #error "Bad: you didn't configure serial ..."
51 #if defined(CONFIG_SERIAL_MULTI)
54 /* Multi serial device functions */
55 #define DECLARE_S3C_SERIAL_FUNCTIONS(port) \
56 int s3serial##port##_init (void) {\
57 return serial_init_dev(port);}\
58 void s3serial##port##_setbrg (void) {\
59 serial_setbrg_dev(port);}\
60 int s3serial##port##_getc (void) {\
61 return serial_getc_dev(port);}\
62 int s3serial##port##_tstc (void) {\
63 return serial_tstc_dev(port);}\
64 void s3serial##port##_putc (const char c) {\
65 serial_putc_dev(port, c);}\
66 void s3serial##port##_puts (const char *s) {\
67 serial_puts_dev(port, s);}
69 #define INIT_S3C_SERIAL_STRUCTURE(port,name,bus) {\
72 s3serial##port##_init,\
73 s3serial##port##_setbrg,\
74 s3serial##port##_getc,\
75 s3serial##port##_tstc,\
76 s3serial##port##_putc,\
77 s3serial##port##_puts, }
79 #endif /* CONFIG_SERIAL_MULTI */
81 void _serial_setbrg(const int dev_index)
83 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
87 /* value is calculated so : (int)(PCLK/16./baudrate) -1 */
88 reg = get_PCLK() / (16 * gd->baudrate) - 1;
91 for (i = 0; i < 100; i++);
93 #if defined(CONFIG_SERIAL_MULTI)
95 serial_setbrg_dev(unsigned int dev_index)
97 _serial_setbrg(dev_index);
100 void serial_setbrg(void)
102 _serial_setbrg(UART_NR);
107 /* Initialise the serial port. The settings are always 8 data bits, no parity,
108 * 1 stop bit, no start bits.
110 static int serial_init_dev(const int dev_index)
112 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
115 /* FIFO enable, Tx/Rx FIFO clear */
119 /* Normal,No parity,1 stop,8 bit */
122 * tx=level,rx=edge,disable timeout int.,enable rx error int.,
123 * normal,interrupt or polling
128 uart->UMCON = 0x1; /* RTS up */
131 /* FIXME: This is sooooooooooooooooooo ugly */
132 #if defined(CONFIG_ARCH_GTA02_v1) || defined(CONFIG_ARCH_GTA02_v2)
133 /* we need auto hw flow control on the gsm and gps port */
134 if (dev_index == 0 || dev_index == 1)
137 _serial_setbrg(dev_index);
142 #if !defined(CONFIG_SERIAL_MULTI)
143 /* Initialise the serial port. The settings are always 8 data bits, no parity,
144 * 1 stop bit, no start bits.
146 int serial_init (void)
148 return serial_init_dev(UART_NR);
153 * Read a single byte from the serial port. Returns 1 on success, 0
154 * otherwise. When the function is succesfull, the character read is
155 * written into its argument c.
157 int _serial_getc (const int dev_index)
159 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
161 /* wait for character to arrive */
162 while (!(uart->UTRSTAT & 0x1));
164 return uart->URXH & 0xff;
166 #if defined(CONFIG_SERIAL_MULTI)
167 static inline int serial_getc_dev(unsigned int dev_index)
169 return _serial_getc(dev_index);
172 int serial_getc (void)
174 return _serial_getc(UART_NR);
179 static int hwflow = 0; /* turned off by default */
180 int hwflow_onoff(int on)
185 break; /* return current */
187 hwflow = 1; /* turn on */
190 hwflow = 0; /* turn off */
197 #ifdef CONFIG_MODEM_SUPPORT
198 static int be_quiet = 0;
199 void disable_putc(void)
204 void enable_putc(void)
212 * Output a single byte to the serial port.
214 void _serial_putc (const char c, const int dev_index)
216 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
217 #ifdef CONFIG_MODEM_SUPPORT
222 /* wait for room in the tx FIFO */
223 while (!(uart->UTRSTAT & 0x2));
226 /* Wait for CTS up */
227 while(hwflow && !(uart->UMSTAT & 0x1))
233 /* If \n, also do \r */
237 #if defined(CONFIG_SERIAL_MULTI)
238 static inline void serial_putc_dev(unsigned int dev_index, const char c)
240 _serial_putc(c, dev_index);
243 void serial_putc(const char c)
245 _serial_putc(c, UART_NR);
251 * Test whether a character is in the RX buffer
253 int _serial_tstc(const int dev_index)
255 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
257 return uart->UTRSTAT & 0x1;
259 #if defined(CONFIG_SERIAL_MULTI)
261 serial_tstc_dev(unsigned int dev_index)
263 return _serial_tstc(dev_index);
266 int serial_tstc(void)
268 return _serial_tstc(UART_NR);
272 void _serial_puts(const char *s, const int dev_index)
275 _serial_putc (*s++, dev_index);
278 #if defined(CONFIG_SERIAL_MULTI)
280 serial_puts_dev(int dev_index, const char *s)
282 _serial_puts(s, dev_index);
286 serial_puts (const char *s)
288 _serial_puts(s, UART_NR);
292 #if defined(CONFIG_SERIAL_MULTI)
293 DECLARE_S3C_SERIAL_FUNCTIONS(0);
294 struct serial_device s3c24xx_serial0_device =
295 INIT_S3C_SERIAL_STRUCTURE(0, "s3ser0", "S3UART1");
296 DECLARE_S3C_SERIAL_FUNCTIONS(1);
297 struct serial_device s3c24xx_serial1_device =
298 INIT_S3C_SERIAL_STRUCTURE(1, "s3ser1", "S3UART2");
299 DECLARE_S3C_SERIAL_FUNCTIONS(2);
300 struct serial_device s3c24xx_serial2_device =
301 INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2", "S3UART3");
303 #endif /* CONFIG_SERIAL_MULTI */
305 #endif /* defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) */